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Table 3 The Mann-Kendall’s trend test for spring, summer and annual time scales

From: Analysis of meteorological droughts in the Lake’s Region of Ethiopian Rift Valley using reconnaissance drought index (RDI)

Season RDI 3 Spring RDI 3 Summer RDI 12 months
S/N Station Name MK test MK test MK test
1 Halaba − 0.95 − 0.03 −1.19
2 Arbaminch 0.11 −0.28 0.31
3 Arsi Negele −2.84** −2.96** −3.00**
4 Butajira −3.06** −0.36 −2.76**
5 Hawassa 0.74 0.06 0.36
6 Kulumsa −0.18 −1.14 −1.64
7 Melkasa −0.97 0.26 −1.21
8 Wolaita 0.65 1.60 1.33
9 Wondogenet 0.12 0.77 −0.24
10 Ziway −0.03 0.65 0.30
  1. Note: ** indicate trends of drought incidence significant at p < 0.01